At the last regional I went to, we swapped a little while we were in line for our goodies, but as soon as the doors opened to the room, we got a table, put our stuff down, and walked around and swapped. Some stayed at their tables and put their swaps out, and others walked around.
I have a large zip lock bag w/my swaps, and another one to put the ones I get. When my bag is empty, I fill it back up from the swaps I left at the table.
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